Mechanical carpenter&#39;s pencil



FIG. 1 is an elevational view of a mechanical carpenter's pencil according to the present design;

FIG. 2 is a side elevational view of a mechanical carpenter's pencil wherein both side views are identical;

FIG. 3 is a plan view of the mechanical carpenter's pencil shown in FIG. 1; and,

FIG. 4 is a bottom view of the mechanical carpenter's pencil shown in FIG. 1. 

The ornamental design for a mechanical carpenter's pencil, as shown. 